Small RNA and degradome sequencing reveals important microRNA function in Astragalus chrysochlorus response to selenium stimuli.
Plant Biotechnol J
; 14(2): 543-56, 2016 Feb.
Article
en En
| MEDLINE
| ID: mdl-25998129
ABSTRACT
Selenium (Se), an essential element, plays important roles in human health as well as environmental sustainability. Se hyperaccumulating plants are thought as an alternative selenium resource, recently. Astragalus species are known as hyperaccumulator of Se by converting it to nonaminoacid compounds. However, Se-metabolism-related hyperaccumulation is not elucidated in plants yet. MicroRNAs (miRNAs) are key molecules in many biological and metabolic processes via targeting mRNAs, which may also play an important role in Se accumulation in plants. In this study, we identified 418 known miRNAs, belonging to 380 families, and 151 novel miRNAs induced by Se exposure in Astragalus chyrsochlorus callus. Among known miRNAs, the expression of 287 families was common in both libraries, besides 71 families were expressed only in Se-treated sample, whereas 60 conserved families were expressed in control tissue. miR1507a, miR1869 and miR2867-3p were mostly up-regulated, whereas miR1507-5p and miR8781b were significantly down-regulated by Se exposure. Computational analysis shows that the targets of miRNAs are involved in different types of biological mechanisms including 47 types of cellular component, 103 types of molecular function and 144 types of biological process. Degradome analysis shows that 1256 mRNAs were targeted by 499 miRNAs. We conclude that some known and novel miRNAs such as miR167a, miR319, miR1507a, miR4346, miR7767-3p, miR7800, miR9748 and miR-n93 target transcription factors, disease resistance proteins and some specific genes like cysteine synthase and might be related to plant hormone signal transduction, plant-pathogen interaction and sulphur metabolism pathways.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Selenio
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Análisis de Secuencia de ARN
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Estabilidad del ARN
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Planta del Astrágalo
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MicroARNs
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Plant Biotechnol J
Asunto de la revista:
BIOTECNOLOGIA
/
BOTANICA
Año:
2016
Tipo del documento:
Article
País de afiliación:
Turquía